The Linuxed - Exploring Linux Distros website has over 170 reviews of distros and common Linux programs by Arindam Sen. What makes it special is that Mr. Sen puts his experiences together in useful charts, such as this one that compares RAM usage for twenty different GUI versions, or this one that compares CPU and RAM usage for 20 KDE distros (page down to see the chart). While the site says it's merely "A non-techie's view of the Linux world," many techies will find it useful as well.